multiplayer, One Piece Pirate Warriors 4, online co-op, dynamic duo, action-packed, anime characters, vibrant costumes, Luffy, Zoro, Nami, Sanji, high-seas adventure, treasure hunt, epic battles, cooperative gameplay, split-screen, shared missions, combo attacks, strategic teamwork, pirate ships, tropical islands, ocean backdrop, intense combat, character abilities, special moves, 3D environment, immersive experience, console gaming, cross-platform play, voice chat communication, player interaction, real-time coordination, festive atmosphere, lively music, colorful graphics, engaging story mode, fan-favorite series, anime-style rendering.